Electrical hot-air heater.



N0. 628,702. Patented July ll, I899.

J. A. ELLIOTT.

ELECTRICAL HOT AIR ,HEATEB.

(Application filed Jan. 10, 1898.)

No Model.)

UNITED STATES PATENT OFFICE.

JOHN A. ELLIOTT, OF BUTTE, MONTANA.

ELECTRICAL HOT-AIR'HEATER.

SPECIFICATION forming part of Letters Patent No. 628,702, dated July 11, 1899.

Application filed January 10,1898. Serial No. 666,262- (No modelh To allwhom it flea/y concern:

Be it known that I, JOHN A. ELLIOTT, a citizen of the United States, anda resident of Butte, in the county of Silver Bow, State of 5 Montana,have invented certain new and use ful improvements in electrical hot-airheaters designed to be applied to any character of heating by hot airand especially intended for thawing frozen placer-ground for mining IOpurposes, of which the following is a specification.

In the drawing the figure is a vertical sectional view, party inelevation, of an electrical hot-air heater embodying the improvements ofmy invention.

My invention relates to electrical hot-air heaters designed for use inheating air for general purposes, and especially designed for use inthawing frozen placer-ground for mining purposes.

Referring by letter to the accompanying drawing, A designates anair-tight tank or envelop, and B designates aninner drum containing acoil of electric wire F.

O designates an air-pipe which enters the tank A near the bottom of thesame. Air is forced through pipe 0, which is coiled around the tank B byany suitable air-pump attachment, and the air thus forced through thepipe 0 is carried around tank B and is discharged into the chamber G atthe top of the tank A and is forced by the action of-said air-pumpthrough said chamber G to the bottom of the tank B, where it passesthrough openings or holes H and comes directly in contact with the coilof the electrical heater F and is discharged through the smaller pipe Dand conveyed through suitable piping to any point at which it may beneeded for use.

E E are insulated pipes through which the connecting-wires pass tobinding-posts of the coil F, supported within the tank B.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

The combination of an outer air-tight tank, of an inner casing spacedtherefrom to form top and side chambers, said casing being provided withopenings at its base, of an air-pipe entering the side chamber anddischarging into the top chamber, said pipe being formed with coilsvertically disposed within the side chamber, an electric heater withsuitably-insulated connections within the inner chamber, and an air-pipedischarging from the inner casing, as set forth.

Dated at Butte, Silver Bow county, Montana, December 8, 1897.

JOHN A. ELLIOTT.

Witnesses:

WILLIAM I. LIPPINCOTT, J. E. RICHARDS.

